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Correction status：qualified
Teacher's comments：下次放在代码段中, 方便运行
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>1. 写一个盒子, 要求用到margin,padding,border, 并用到它们的完整语法, 简写语法</title>
<style>
#box{
width: 500px;
height: 500px;
border: 1px solid #cccccc;
/*margin-top: 20px;*/
/*margin-right: 30px;*/
/*margin-bottom: 40px;*/
/*margin-left: 50px;*/
margin: 20px 30px 40px 50px;
/*padding-top: 20px;*/
/*padding-right: 30px;*/
/*padding-bottom: 40px;*/
/*padding-left: 50px;*/
padding: 20px 30px 40px 50px;
}
</style>
</head>
<body>
<div id="box"></div>
</body>
</html>